NEUROPTERA OF ROTHIEMURCHUS AND KINGUSSIE. 355 



nestles in a wood composed of fir, beech, alder, &c., 

 which affords shelter to the insects after they have 

 come to maturity in the loch. I have had some 

 good collecting along the margin of this loch. 



Giack shooting-lodge stands at the head of Glen 

 Tromie, about 11 miles from Kingussie. In its 

 neighbourhood are two lochs, one being further up 

 the glen and the other below the lodge. At the 

 former, Loch Bhradain, I have spent some very 

 enjoyable days in collecting ; and at the latter, Loch- 

 an-t-Seilich (which, by the way, means "the loch of 

 the willows," although I could not find any), a larger 

 sheet of water, I had the good fortune to take two 

 species of Caddis-flies which I had not previously 

 captured in Scotland. 



On the evening of July 27th, while driving down 

 Glen Tromie from these lochs, I passed through a 

 dense cloud of Hydropsyclie instahilis which extended 

 for upwards of five miles. With a single sweep of 

 my large net I could take fifty or sixty specimens — 

 a fair indication of the density of the cloud. I have 

 never seen anything equal to it in size. I again 

 drove down the glen on 31st July, bvit did not then 

 see a single individual of this species. I may men- 

 tion, however, that on the occasion when the insects 

 were so numerous the evening was very lovely, 

 Avith little wind and not too much heat, while on 

 the latter occasion the air was rather cooler. 



At Loch-an-Eilan, about 3^ miles from Aviemore 

 station, I first made my* acquaintance with Limno- 

 philus subcentralis, an interesting addition to the 

 British Trichoptera, wdiicli has since been recorded 

 from two or three fresh localities. The loch is well 

 known to ornithologists from the fact of its being 

 now one of the few spots in this country where the 

 Osprey, or Fishing Eagle, nests and brings forth its 

 young. The people in the locality informed me that 

 two young birds had been hatched a few weeks 

 before I visited the district last year. 



Loch Alvie was visited on one occasion only; from 



